US660820A - Magneto-electric generator. - Google Patents

Description

No. 660,820. Patented 001. 30, I900.

. c; H. NORTH.

IAGNETU ELECTRIC GENERATOR.

(Application fllod Aug. 24, 1900.)

2 Shaeta-Sha0t l.

' (N0 Ilodel.)

Even Col? W ufnessea No. 660,820. Patented Oct. 30, I900. 0. H. NORTH.

MAGNETU ELECTRIC GENERATOR.

(Application filed Aug. 24, 1900.)

(No Model.) 2 Sheets-Sheet 2.

7f fnesed iver-af CC: ,jwlT :H \{GENERATOR FRAME $3M WWWWWAM @fi GENERATOR ARMATURE UNITE STATES PATENT OFFICE.

CHARLES II. NORTH, OF CLEVELAND, OHIO, ASSIGNOR TO THE NORTH ELECTRIC COMPANY, OF SAME PLACE.

MAGNETO-ELECTRIC GENERATOR.

SPECIFICATION forming part of Letters Patent No. 660,820, dated October 30, 1900.

Application filed August 24, 1900. Serial No. 27,881. \No model.)

10 all whom it may concern:

Be it known that I, CHARLES H. N ORTH, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Magneto-Electric Generators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

My invention relates to magneto-electric generators and the circuit connections thereof; and my object is to primarily provide such an instrument with improved automatic means for opening a shunt-circuit normally around the armature-coils when said generator is operated.

The invention consists in the mechanical means I employ to effect this end; and it further consists in the construction and combination of parts more fully described hereinafter and definitely set forth in the claims.

In the drawings which fully illustrate my invention, Figure 1 is a side elevation of a magneto-electric generator to which my invention has been applied, one end thereof being broken away to disclose the interior. Fig. 2 is a longitudinal vertical section of the same, part of the interior being shown in section and part in full. Fig. 3 is a rear elevation, and Fig. 4 a vertical cross-section looking toward the driving end of the instrument. Fig. 5 is a longitudinal central section of the driving-shaft; and Fig. 6 is a partial longitudinal section in a plane at right angles to the plane of Fig. 5, being taken on the line 6 6 of Fig. 5. Fig. 7is a diagram illustrating the circuit connections.

For the better illustration of my invention 1 will describe now briefly the construction of the machine to which I have shown it as applied.

Referring to Figs. 1 to 4, M represents a battery of permanent horseshoemagnets, the like poles of which are joined by common polepieces P, which pole-pieces are bent to partially confine a substantially cylindrical armature-space and are held by the outside contiguous frame-bolts 1). End plates B B are seen red upright against the ends of the polepieces P by these bolts 10, which pass through them for that purpose. These end plates B B support the armature-shaft S and drivingshaft V. The magnets are secured in place by screws C, passing through binding-washers and between the individual magnets into the pole-pieces P. The armature-shaft.carries a pinion s, the driving-shaft carrying a gear 1;, meshing therewith, and a crank H, whereby the armature is rotated.

In applying myinvention to such a machine as above described I employ as part of the circuit connection a resilient switch member R, which is carried upon an insulating-block T, fastened upon the end plate B. This insulating-block T is preferably made annular and connected to the plate by screws t, as shown. The member R has a projection 1', which contacts the end of a pin 3, which pin is set into but insulated from the armatureshaft S and forms a terminal for the armature-coil 5 the other terminal of said coil being in the armature-shaft. This member extends at one end across the end of the driving-shaft V, its resilience pressing it toward the shaft, and it is provided nearits base with a lug r whereby it may be connected to form a terminal of the main circuit, the other terminal being connected with the frame at any desired point.

The shaft V and its connections are best shown in Figs. 5 and 6. It is' a compound member, including the solid shaft 1) and the inclosing tube 42 between which there may be limited movement. The tube is journaled in suitable bushings D, carried by the end plates B B, and locked by a collar E with a setscrew e. The switch member-R normally contacts the end of the tube, whereby the shunt is established via this switch member, tube,and frame around the arm attire-winding. Just Within the outer end of the tube it carries loosely a plug 0 of insulating material, behind which is a sliding bolt This sliding bolt v carries a pin 2;, whose ends project into longitudinal slots W. This construction permits only longitudinal movement of the bolt with respect to the tube o The shaft o fills the rest of the tube '0 Its inner end has a V notch o into which fits a cooperating V- point on the end of the bolt v and the tube has a short circumferential slot '0 in which rides the head of the screw o which sets into the shaft if. This cmistruction permits only limited rotation of the shaft with respecl to the tube n. The angle of the notch is sufficiently wide so that a rotation of the shaft 1; with respect to the tube n will operate to cause the notch 2; to ride up into a less intimat-e contact with the bolt, shoving itand insulatii'ig-plug 0 toward the outer end of the tube, which breaks the contact between the switch member R and the tube, opening the shunt.

A spring normally holds the shaft v in position so that the notch it" may he in the most intimate contact therewith, and the resilience of the switch member R forces the bolt into such location. The connections which effect. this are the following: The tube 0" carries a hub rigid therewith, on itsinner end. This hub has a boss over which takes the gear wheel 0, which is rigidly secured thereto. This gear is simply a plate whose edge is flanged outwardly to have teeth out therein. The disk portion of this gear has a number of large holes r punched through it. One end of a spring 12 which is preferably a helical spring of few turns, is carried by the gearwheel 2*,preferably as shown,by hookingover an integral projection c The other end is similarly fastened to the plate or retainer n. This retainer "0 is rigidly connected with the shaft c, preferablyseating around a squared boss o thereon, with a nut c securing it in place. Its edge is flanged inwardly toward the gear 1?, and at intervals at number of tongues v which are integral with said edge, project into the circular holes r referred to, there being a corresponding number of tongues and holes.

A crank H is suitably mounted on the shaft c, and the turning of this crank operates immediately to rotate the retainer 0 overcoming the spring 1112, which normally holds the retainer in constraint, so that its teeth are in contact with an edge of the holes ii, for the force of the magnets retards the armature, and hence the gear 1;, and the retainer 21 thus moves independently of the gear '0' until said tongues strike the opposite sides of the holes i2 when the gear is driven thereby. This limited movement of the shaft c with respect to the tube n will have moved the bolt '0 in the manner described above, the plug c forcing the switch member R away from the tube 12 breaking the shunt, and the shunt will remain open throughout the continued rotation.

It will be noticed that the tube 0 may be journaled in the bushings D with sufficient snugness to insure an excellent electric contact, as well as perfect mesh of the gearing, without giving the shunt-operating mechanism any tendency to bind, the shaft c and bolt 12 being as loose within the tube as de sired. This is an important feature of my invention.

In case it is desired to shunt around ones own bell, for example, when operating the coca-42o generator, I provide an additihial contact member R, carried by the block '1, having a connecting-ear a" and a contactpoint "r in the path of the member R and adapted to be engaged thereby when the machine is opcra ted, but normally out of contact.

The generator shown is adapted particularly for telephone service, and it may operate to ringones own hell or not, as desired, according to whether the switch member R is out of use or is a terminal of a shunt around the bell. Thus in the diagram Fig. 7 the circuit is normally as follows: from the main A through the bell to swii ch It, t hence through the tube r and the frame to the main A. hen the generator is operated, the connection from theswitch R to the tube is broken, and the circuit is then (when the bridging wire ais not used) through the bell and through the pin r, set in the armatlire-shaft, thence through the armature-coils, the frame of the machine, and to the main A. When the bridging wire a is used, operation of the generator shifts the switch R to contact R, and the circuit is closed from A through the branch a around the bell and through the armature to the main A.

Having described my invention, I claim 1. In a magneto-electric generator, in combination, a compound driving-shaft, consisting of a tubular member and an inclosed rod between which there is limited relative rotative movement, an armature adapted to be driven by one member of said shaft, and d riving means connected with the other whereby the armature may be rotated, a plug within the sleeve, and means whereby said relative rotative movement moves said plug, and a switch member actuated by such movement, substantially as described.

2. In a magneto-clectric generator, in combination, a driving-shaft, an insulator carried near the end of said shaft, a switch member normallycontacting the end of said shaft, a crank connected with said driving-shaft, means for forcing said insulator against said switch member to break its contact with said driving-shaft, said means being operated by the rotation of the said crank, substantially as described.

3. In a magneto-electric generator, in combination, a driving-shaft, a switch member Which makes electric contact with said driving-shaft, a wheel mounted on said shaft, means for allowing limited relative rotation between said drivingshal't and said wheel, means for holding said driving-shaft in an extreme position, an armature driven by said Wheel, and means whereby a relative rotation of said shaft and wheel breaks the contact of said switch member with said driving-shaft, substantially as described.

4. In a magneto-electric generator,an armature, a compound driving-shaft consisting of a rotatable sleeve and an inclosed rod, a crank connected with said rod, a gear connection between said slceve and the armatiire-shaft,

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means for li miting the relative rotative movement between said rod and sleeve,a plug within said sleeve, aswitch member normally engaging the end of said sleeve, and cooperating inner faces carried between said plug and said rod whereby said relative rotalive movement may force the switch member-away from the sleeve, substantially as described.

5. In a magneto-electric generator, in com bination, a compound driving-shaft, consisting of a tubular member and an inclosed rod between which there is limited relative rotative movetnent, an armature adapted to be driven by one member of said shaft, and driving means connected with the other whereby the armature may be rotated, a bolt within the sleeve, and means whereby said relative rot'ative movement moves said bolt, a spring connecting the two members of the shaft and tending against relative rotative movement,

and a resilient switch member adapted to be moved by said boltbut tending to return said bolt to its normal position, substai'itially as described.

6. In a magneto-electric generator, in combination, a suitably-journaled armature, a compound d living-shaft consistingof asleeve and a contained rod. a driving member mechanically connected with one part of said shaft, and a mechanical connection between the other part of the shaft and the armature, means for preventing relative longitudinal movement between the rod and sleeve but allowing some rotative movement between them, a bolt within said sleeve, means for preventing relative rotative movement between the bolt and sleeve but allowing some longitudinal movement of the bolt, cooperating inclined faces between the bolt and rod, and a switch operated by the longitudinal movement of said bolt, substantially as described.

7. In a magneto-electric generator, in combination, a driving-shaft, a switch member normally contacting said shaft, said drivingshaft comprising a sleeve, an insulator carried slidably within the end thereof, a slidable bolt therebehind, means for preventingrelative rotation between said bolt and sleeve, an inner shaft, a crank connected therewith, means for preventing relative longitudinal movement between said sleeve and inner shaft, said shaft and bolt having cooperating inclined end faces, whereby a movement of said inner shaft with respect to said sleeve moves said insulator to break the contact between said switch and said shaft, substantially as described.

In a magneto-electricgenerator, in combination, a frame, an armature journaled therein, a compound driving-shaft journaled in said frame, said shaft consisting of a sleeve and an inner rod, said sleeve being in electrical contact with the frame, gearing connecting one member of the shaft with the armature, and a driving-crank connected with the other member, a switch membernormally engaging said sleeve and thereby making a shunt around the armature, means for limiting relative rotative movement between the parts of the shaft, while allowing some such movement, and means whereby such movement separates the switch member from contact with the end of the sleeve, substantially as described.

9. In a magneto-electric generator, in comhina-tion, a compound driving'shaft consisting of a sleeve and an inclosed rod, a @0111- pound drivin mechanism loosely connecting with play said sleeve and rod, said driving mechanism consisting of a wheel rigid with one member of the shaft and a retainer-plate rigid with the other member, the members of such mechanism carrying disconnected shoulders standing in the path of each other whereby a limited rotative movement is allowed between the two, and a switch actuated by said relative rotative movement, substantially as described.

10, In a magneto-electric generator,in combination, a compound drivingshaft consistsisting of a sleeve and a rod within the same,

a driving mechanism consisting of a wheel mounted on one member of said shaft and a retainer-plate rigid with the other member, one member-of such mechanism havinga pro jection and the other member having separated shoulders between which said projection takes and with either of which it may engage, a spring normally holding said projection against one of said shoulders but allowing it to move until engaging the other shoulder, an armature, and a driving mechanism connected respectively with the two members of said shaft, and a switch actuated by the relative rotative movement between said members, substantially as described.

11. In a magneto-electric generator, in combination, a compound driving-shaft, a switch member which normally contacts with said driving-shaft, a driving mechanism consisting of a wheel mounted on one member of said driving-shaft and a retainer-plate rigid with the other memberof said shaft, one member of such mechanism having projections taking into holes .in the other member, a spring normally holding said members so that said projections contact the edges of said holes, an armature driven by said wheel, and means whereby the relative rotation between said wheel and driving-shaft breaks the contact of said switch member with said drivingshaft, substantially as described.

12. In a magneto-electric generator, in combination, an inner driving-shaft, a sleeve carried thereabout, a resilient switch member normally in contact therewith, a gear mounted on said shaft, and having holes in the body thereof, a retainer-plate rigidly carried by said inner driving-shaft, and having its edge flanged toward the disk of said gear, tongues integral therewith projecting into said holes, a spring carried within said retainer and connecting it to said gear, a slidable bolt within said sleeve, there being cooperating inclined faces between said bolt and inner shaft whereby relative movement between them may force the switch member away from said sleeve, and an armature connected with said gear, substantially as described.

13. In a magneto-electric generator, in combination, a driving-shaft, a resilient switch member normally contacting said drivingshaft, an independent switch member lying in proximity to said resilient member, an insulator carried by said driving-shaft, means for moving said insulator so as to move said resilient member out of contact with said driving-shaft and into contact with said independent switch member, substantially as described.

14. In a magneto-electric generator, the combination of a compound driving-shat't, consisting of a sleeve and an inclosed rod between which there is relative rotative movement, an armature and a driving member mechanically connected respectively with the two parts of said driving-shaft, a switch member normally contacting said driving-shaft, an independent switch member lying in the path of the switch member first mentioned and normally disconnected therefrom, and means whereby the relative rotative movement between the parts of the shaft moves the switch member which normally contacts the sleeve out of engagement therewith and into engagement with the other switch member, substantially as described.

15. In a magneto-electric generator, in combination, a driving-shaft comprising a sleeve and an inner shaft, an insulator carried within the end of said sleeve, an insulating-block fastened to the frame of said generator, a resilient switch member carried by said block and having permanentcontact with the armature of said generator, and normally contacting the said sleeve, a second switch member also mounted on said block and lying behind said resilientswitch member, said switch members having means for connecting wiring thereto and means whereby the turning of said inner shaft moves said insulator, to move the switch member which normally contacts the sleeve out of engagement therewith and into engagement with the other switch member, substantially as described.

In testimony whereof I hereunto affix my signature in the presence of two Witnesses.

CHARLES H. NORTH. Witnesses:

F. D. AMMEN, ALBERT H. BATES.

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